The Mansfield plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.
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Mostly sunny; warmer
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67° on Nov. 11, 2016, the hottest reading for this week of the year since 1994. Next is 66° in 1999.
Mansfield’s center stands about 1,420 ft above sea level. Within three miles the land runs from 1,360 ft to 1,540 ft, a difference of 180 ft: gently rolling country. The highest named summit within 15 miles is Michigamme Mountain, about 1,610 ft, 4 miles south-southwest.
Under the town center the state geologic map shows Baraga Group; Michigamme Formation, undivided (mixed-clastic, metagraywacke), from the Paleoproterozoic, 1.6 to 2.5 billion years old.
The section below crosses 4 rock units mapped at the surface.
Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 43×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.
Mixed-clastic, metagraywacke. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 12 mi of the line.
Mafic-volcanic. Age: Paleoproterozoic, 1.6 to 2.5 billion years old. About 7 mi of the line.
Amphibolite, schist, metasedimentary. Age: Neoarchean, 2.5 to 2.8 billion years old. About 3 mi of the line.
Gneiss, amphibolite, migmatite. Age: Paleoarchean to Neoarchean, 2.5 to 3.6 billion years old. About 2 mi of the line.
From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.
Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.
A raindrop that lands in Mansfield reaches Lake Michigan by way of Michigamme Reservoir, the Michigamme and the Menominee: about 140 river miles. From there it moves on through the Great Lakes, over Niagara Falls and down the St. Lawrence to the Atlantic.
Lake on the way: Michigamme Reservoir.
120 miles of the trip are on the Menominee.
Traced down the USGS NHDPlus V2.1 river network from the Census center point of Mansfield; river miles along the main stem, rounded.
Mansfield has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 0° in January. About 31 inches of rain fall in a normal year.
Normals 1991–2020 and records since 1994 at Amasa 1 W, 15 miles west. NOAA, through RCC-ACIS.
